Answer:
14x + 11
Explanation:
So basically you have to distribute the numbers outside the parenthesis to the in side. So 4(2x-1)= (4*2x-(4*-1))= (8x-4). Then do the same to the second equation (6x+15). Finally you add it to the other equation.
(8x-4)
+(6x+15)
-------------
14x+11